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(No Model.)

- D. S. HAINES 8v D.LAKE.

INSULATING SUPPORT FOR ELECTRIC GONDUGTOBS. N0. 296,688.. PatentedApr. 8,1884.

WITNESSES ulNVENTORS 1W By their Attorneys ,fS fe/J-hh ,DLa/ze Q80 2% w w aj rrsn STATES PATENT Fries.

DAVID S. HAYNES, OF N EWV YORK, AND STEPHEN D. LAKE, OF BROOKLYN, N. Y.

INSULATING-SUPPORT FOR ELECTFHC CONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 296,688, dated April 8, 188%.

Application filed Xovember 30, 1883. (No model.)

To all whom it may concern.-

Be it known that we, DAVID S. HAINES, of lines. the city and county of New York, and STE- y of Fig. 2.

PHEN D. LAKE, of Brooklyn, Kings county, both in the State of New York, have jointly invented a new and useful Improvement in Insulating-Supports for Electric Conductors, of which the following is a specification.

Our invention relates especially to the class of insulatingsupports commonly made of porcelain or similar material, and which are fastened to a cross-arn1, block, pole, building, or other structure by means of ordinary woodscrews. For the purpose of securing wires to insulators of this class, it has heretofore been necessary either to twist the conducting-wires around the same or to fasten them thereto by means of separate pieces of wire, technically termed tie-wires.

The object of our invention is to provide aninsulator to which the conductors may be more readily attached, and which will more perfectly preserve the insulation of the conductors.

Our invention consists in constructing an insulator in two separate pieces or sections, having grooves formed across their faces, and adapted to be fastened to a support, with their grooved faces confronting, by means of a screw passing through their centers and entering the support. The grooves in the confronting faces lie in the same direction and opposite each other, and together form a seat for the conductor which is to be supported. Projecting points or lugs are formed in the beds of each groove, and these serve to force the conductor out of a direct line, pressing it in opposite directions at different points. Each insulator is preferably provided with two or more pairs of these grooves, and is therefore adapted to support more than one conductor. In some instances it is found advisable to have the different pairs of grooves of different dimensions, for the purpose of accommodating conductors of various sizes.

In the accompanying drawings, which illustrate our invention, Figure 1 is a View showing the inner end of one section,for instance, the top of the insulator-and Fig. 2 is a like view of the bottom section. Fig. 3 is a section of the complete insulator through the line w m of Fig. 1, showing the conductorin dotted Fig. 4 is a section through the line y Referring to these figures, a and a represent the two sections of the insulator, which may be of porcelain, glass, or other suitable insulatin g material. They are designed to be firmly clasped together by a screw, 0, which passes through apertures c 0 formed through their centers. Two parallel angular grooves, b b and b are respectively formed across the confronting faces of the sections a and a. 'From the bottom of each of these grooves project small lugs d (P, arranged to securely clamp the conductor which passes through the same. The projections d d, which are formed in the grooves of the upper section, a, for instance, are located near the respective ends of the grooves, while the lugs d d in the lower section, a, project upward at points midway between the lugs d d in the confronting groove of the upper section, a. The lugs in the section a serve thus to press the conductor E, Fig. 3, downward, while the intermediate lug in the section a presses the conductor upward. When the conductor is thus clamped by the two sections, it is prevented from moving longitudinally.

For the purpose of more perfectly insuring that the conductor shall be firmly held in place, the lugs (Z are preferably formed with sharp prismatic edges, as indicated in the drawings,

though this construction is not always essential.

The different pairs of grooves are preferably made of different sizes, as shown in Fig. 4, to accommodate larger or smaller wires, as may be desired. A semicircular groove, f, is also formed entirely around the support, onehalf of the groove being formed on each portion, by means of which the conducting-wire may be secured, if desired, in the ordinary manner. The central hole, 0, is preferably countersunk in each section, as shown by g and 9, Fig. 4, so that the relative positions of the two sections may be reversed, if desired.

It is evident that a side of one portion havin g the grooves and projections may be clamped against the flat side of the other section, thereby holding a smaller Wire than when the grooved sides are put together.

\Ve are aware that insulators have been heretofore made in two parts, which are arranged to fit together into a frame or boX, which latter is secured to the pole or other support, and also that insulators have been made in two parts, each of which parts requires to be attached to the pole or other support by a separate screw.

lVe claim as our invention 1. An insulator for electric conductors, made of porcelain, glass, or other suitable material, in two or more sections, and secured together and to a support by a single screw passing therethrough, substantially as described.

2. An insulatingsupport made in two or more sections, having parallel grooves across their faces, and adapted to be held upon a single screw, substantially as and for the purpose described.

3. An insulating-support made in two sections and having an annular semicircular groove formed upon its exterior along the contiguous edges of said sections, substantially as described.

4. An insulating'support consisting of the two sections a and a, having the angular grooves b and b the raised projections d and d", and the annular semicircular groovef, substantially as described.

In testimony whereof we have hereunto subscribed our narncs this 28th day of November, A. D. 1888.

DAVID S. l-IAINES. STEPHEN D. LAKE. 

